名词
中文翻译：警报杆
同义词：
['alarm rod', 'alarm stem', 'alarm post']
例句：
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1.The policeman stood at the corner with his hands on his alarm bolt stem.
警察站在拐角处，双手放在他的警铃杆上。
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2. The old man was sitting by the window, watching the alarm bolt stem.
老人坐在窗边，看着警铃杆。
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3.The firefighters rushed to the scene and quickly removed the alarm bolt stem.
消防员迅速赶到现场并迅速移走了警铃杆。